Minor release update

Removed `setup.py` and its adjasant files.
Removed `tox`.
Wrote meta data in `pyproject.toml`.
Migrated from `playsound` to `magicsound` (not tested).

.github/workflows/ruff.yml

@@ -0,0 +1,8 @@
+name: Ruff
+on: [push, pull_request]
+jobs:
+  ruff:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: chartboost/ruff-action@v1

.github/workflows/tests.yml

@@ -1,23 +0,0 @@
-name: Tests
-on:
-  - push
-  - pull_request
-jobs:
-  test:
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        os: [ubuntu-latest, windows-latest]
-        python-version: ["3.10"]
-    steps:
-      - uses: actions/checkout@v2
-      - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v2
-        with:
-          python-version: ${{ matrix.python-version }}
-      - name: Install dependencies
-        run: |
-          python -m pip install --upgrade pip
-          pip install tox tox-gh-actions
-      - name: Test with tox
-        run: tox